﻿//-----------------------------------------------------------------------
// <copyright file="MouseMoveInputData.cs" company="Nathan Miller">
// Copyright (c) Nathan Miller.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// </copyright>
//-----------------------------------------------------------------------
namespace TileTool.Input.Mouse
{
    using System;
    using TileTool.Common.Math;

    /// <summary>
    /// Mouse move input data.
    /// </summary>
    public class MouseMoveInputData : MouseInputData
    {
        #region Constructor

        /// <summary>
        /// Mouse move input data constructor.
        /// </summary>
        /// <param name="builder">Builder data.</param>
        public MouseMoveInputData(Builder builder) :
            base(builder)
        {
            if (builder == null)
            {
                throw new ArgumentNullException("builder", "Builder must be non-null.");
            }

            this.LastPos = builder.LastPos;
        }

        #endregion

        #region Properties - Public

        /// <summary>
        /// Gets the last position of the mouse relative to the lower left of the canvas.
        /// </summary>
        public Vector2D LastPos
        {
            get;
            protected set;
        }

        /// <summary>
        /// Gets the delta amount for the mouse.
        /// </summary>
        public Vector2D Delta
        {
            get
            {
                return this.Pos - this.LastPos;
            }
        }

        #endregion

        #region Classes - Public

        /// <summary>
        /// Mouse move data builder.
        /// </summary>
        public class Builder : MouseInputDataBuilder
        {
            #region Constructor

            /// <summary>
            /// Default constructor
            /// </summary>
            public Builder()
            {
                this.LastPos = Vector2D.Zero;
                this.InputType = InputDataType.MouseMove;
            }

            #endregion

            #region Properties - Public

            /// <summary>
            /// Gets the last position of the mouse.
            /// </summary>
            public Vector2D LastPos
            {
                get;
                set;
            }

            #endregion

            #region Methods - Public

            /// <summary>
            /// Build the input data.
            /// </summary>
            /// <returns>Returns an instance of built input data.</returns>
            public override InputData Build()
            {
                return new MouseMoveInputData(this);
            }

            #endregion
        }

        #endregion
    }
}
